He seemed interested and now he's ignoring me, why is he so confusing? What do you think of this behavior? what do I do now?

Anonymous
This is a guy I got back in touch with few months ago. I've always sort of been interested in him but kept it low since he was in along serious relationship. However when he told me he was no longer with his girlfriend, I tried to gauge his interest and told him I would have been pleased to see him.
So far our exchange had been more friendly rather than flirty, and he replied by saying the town where I was moving to wasn't so far from where he lived. Anyway I took this a a clear sign of interest (ie we couldn't see each other but maybe we could from now on.. etc) except that since he replied this he isn't giving me news and is simply ignoring me. It's not the first time he's done this actually (it's the third), and previously I had been the one to start the conversation over.
So this is it, this guy is just really confusing to me and I can't tell whether he's just being polite or if there's something behind.
He was the one to contact me back, and so far seemed interested in what I was doing.. At one point he sort of opened up on why things had ended with his former girlfriend, said he was managing well. BUT he ignores me for a month and so far I've had to initiate the conversation back twice.

I know he's busy, he has a young kid, he works, studies etc.. but I see him being active and not replying to me, and I mean who ignore someone for a month unless you really don't want to talk to them right?

So my question is; can anyone based on what I've written read him better than me and enlighten me?
What should I do then? I don't want to message him again as in "look who you forgot existed..." If he hadn't implied we would see each other I would have understood things clearly.
He seemed interested and now he's ignoring me, why is he so confusing? What do you think of this behavior? what do I do now?
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